Rebellious Republican Rep. Justin Amash has won his primary re-election battle in Michigan’s 3rd district against his challenger Brian Ellis, a blow to the GOP Establishment which had put significant resources into the race.

Ellis conceded the race as Amash had 55 percent of the vote and Ellis had 44 percent with 44 percent of the precincts reporting.

Allies of Speaker John Boehner had rallied for pro-establishment candidate Republican Brian Ellis and to take out Amash, the first lawmaker to vote against Boehner for speaker on the House floor in January 2013.

Ellis, a Grand Rapids businessman, loaned his campaign over $1 million and earned the support of the U.S. Chamber of Commerce and the Michigan Chamber of Commerce.